for NAME in joe jane juliedoADDRESS="$NAME@example.com"MESSAGE='Projects are due today!'echo $MESSAGE | mail -s Reminder $ADDRESSdone…

vim 编程环境配置: .vimrc 文件配置如下:(.vimrc文件放到家目录下:/root :然后退出 xshell 再登陆进来xshell) set nocompatible set history=100 filetype on filetype plugin on filetype indent on set autoread set mouse=c syntax enable set cursorline hi cursorline guibg=#00ff00 hi CursorCo…

Linux Bash Script loop shell 编程之流程控制 for 循环.while 循环和 until 循环 for var in item1 item2 ... itemN do command1 command2 ... commandN done for var in item1 item2 ... itemN; do command1; command2- done; refs http://www.imooc.com/learn/408 https://linuxize…

内部变量指的是把变量定义在playbook里面或者是执行结果作为变量 循环语句-标准Loops [root@LeoDevops playb]# cat p_loop.yaml - hosts: u12 gather_facts: False tasks: - name: debug loops debug: msg="name -------> {{ item }}" with_items: - one - two 运行结果如下: [root@LeoDevops playb]#…

Standard Loops with_items - name: add several users user: name={{ item }} state=present groups=wheel with_items: - testuser1 - testuser2 # with_items: somelist - name: add several users user: name={{ item.name }} state=present groups={{ item.groups }…

在linux下写了一个简单的shell,循环10次． test.sh #!/bin/bash ## ##循环10次 ## ; i<; i++)); do echo Good Morning ,this is $i shell program. done 执行:sh test.sh 报下面的错误． Syntax error: Bad for loop variable 在网上搜索了一下． 因为Ubuntu为了加快开机速度,用dash代替了传统的bash,所以我们这样执行就没问题． bash tes…

There are two types of bash for loops available. One using the “in” keyword with list of values, another using the C programming like syntax.       This article is part of our on-going bash tutorial series.       This explains both of the bash for lo…

continue — Skip to the next iteration of a loop in a shell script…

Linux Mint中写了一个简单的shell脚本,利用for..do..done结构计算1+2+3......+100的值,结果执行"sh -n xxx.sh"检测语法时总是报错,但在PC机上可正常运行: 脚本: #!/bin/bash #information PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin export PATH read -p "Please input a…

while do done, until do done (不定循环) while [ condition ] <==中括号内的状态就是判断式 do <==do 是回圈的开始! 程序段落 done <==done 是回圈的结束 until [ condition ] do 程序段落 done [root@www scripts]# vi sh13.sh #!/bin/bash # Program: # Repeat question until user input correct an…